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SubjectRe: [PATCH 1/2] lockdep: improve current->(hard|soft)irqs_enabled synchronisation with actual irq state
Hi Nicholas,

I love your patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on powerpc/next linus/master v5.8-rc6 next-20200723]
[cannot apply to tip/locking/core]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Nicholas-Piggin/lockdep-improve-current-hard-soft-irqs_enabled-synchronisation-with-actual-irq-state/20200723-185938
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 9ebcfadb0610322ac537dd7aa5d9cbc2b2894c68
config: nds32-allyesconfig (attached as .config)
compiler: nds32le-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nds32

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

In file included from include/asm-generic/bitops.h:14,
from ./arch/nds32/include/generated/asm/bitops.h:1,
from include/linux/bitops.h:29,
from include/linux/kernel.h:12,
from include/linux/list.h:9,
from include/linux/rculist.h:10,
from include/linux/pid.h:5,
from include/linux/sched.h:14,
from arch/nds32/kernel/asm-offsets.c:4:
include/linux/spinlock_api_smp.h: In function '__raw_spin_lock_irq':
>> include/linux/irqflags.h:158:31: error: implicit declaration of function 'arch_irqs_disabled'; did you mean 'raw_irqs_disabled'? [-Werror=implicit-function-declaration]
158 | #define raw_irqs_disabled() (arch_irqs_disabled())
| ^~~~~~~~~~~~~~~~~~
include/linux/irqflags.h:174:23: note: in expansion of macro 'raw_irqs_disabled'
174 | bool was_disabled = raw_irqs_disabled(); \
| ^~~~~~~~~~~~~~~~~
include/linux/spinlock_api_smp.h:126:2: note: in expansion of macro 'local_irq_disable'
126 | local_irq_disable();
| ^~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[2]: *** [scripts/Makefile.build:114: arch/nds32/kernel/asm-offsets.s] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [Makefile:1175: prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:185: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.

vim +158 include/linux/irqflags.h

81d68a96a398448 Steven Rostedt 2008-05-12 132
df9ee29270c11db David Howells 2010-10-07 133 /*
df9ee29270c11db David Howells 2010-10-07 134 * Wrap the arch provided IRQ routines to provide appropriate checks.
df9ee29270c11db David Howells 2010-10-07 135 */
df9ee29270c11db David Howells 2010-10-07 136 #define raw_local_irq_disable() arch_local_irq_disable()
df9ee29270c11db David Howells 2010-10-07 137 #define raw_local_irq_enable() arch_local_irq_enable()
df9ee29270c11db David Howells 2010-10-07 138 #define raw_local_irq_save(flags) \
df9ee29270c11db David Howells 2010-10-07 139 do { \
df9ee29270c11db David Howells 2010-10-07 140 typecheck(unsigned long, flags); \
df9ee29270c11db David Howells 2010-10-07 141 flags = arch_local_irq_save(); \
df9ee29270c11db David Howells 2010-10-07 142 } while (0)
df9ee29270c11db David Howells 2010-10-07 143 #define raw_local_irq_restore(flags) \
df9ee29270c11db David Howells 2010-10-07 144 do { \
df9ee29270c11db David Howells 2010-10-07 145 typecheck(unsigned long, flags); \
df9ee29270c11db David Howells 2010-10-07 146 arch_local_irq_restore(flags); \
df9ee29270c11db David Howells 2010-10-07 147 } while (0)
df9ee29270c11db David Howells 2010-10-07 148 #define raw_local_save_flags(flags) \
df9ee29270c11db David Howells 2010-10-07 149 do { \
df9ee29270c11db David Howells 2010-10-07 150 typecheck(unsigned long, flags); \
df9ee29270c11db David Howells 2010-10-07 151 flags = arch_local_save_flags(); \
df9ee29270c11db David Howells 2010-10-07 152 } while (0)
df9ee29270c11db David Howells 2010-10-07 153 #define raw_irqs_disabled_flags(flags) \
df9ee29270c11db David Howells 2010-10-07 154 ({ \
df9ee29270c11db David Howells 2010-10-07 155 typecheck(unsigned long, flags); \
df9ee29270c11db David Howells 2010-10-07 156 arch_irqs_disabled_flags(flags); \
df9ee29270c11db David Howells 2010-10-07 157 })
df9ee29270c11db David Howells 2010-10-07 @158 #define raw_irqs_disabled() (arch_irqs_disabled())
df9ee29270c11db David Howells 2010-10-07 159 #define raw_safe_halt() arch_safe_halt()
de30a2b355ea853 Ingo Molnar 2006-07-03 160

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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